Journal
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
Volume 21, Issue 9, Pages 6994-7010Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TWC.2022.3153792
Keywords
Radar antennas; Radar; Radar detection; Transmitting antennas; Phased arrays; Receiving antennas; MIMO communication; Multi-target detection; reconfigurable intelligent surface; radar systems; waveform design
Funding
- National Key Research and Development Project of China [2020YFB1807100]
- National Natural Science Foundation of China [61829101, 61941101, 62032003]
- Beijing Natural Science Foundation [4222005, L212027]
- NSF [CNS-2107216, EARS-1839818]
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This paper proposes a MetaRadar scheme using reconfigurable intelligent surfaces (RIS) to improve the detection accuracy of radar systems by customizing channel conditions through adjusting the phase shifts of RIS. A waveform and phase shift optimization (WPSO) algorithm is designed to effectively solve the multi-target detection problem, and the performance of the proposed MetaRadar scheme is analyzed theoretically. Simulation results show that the detection performance of the MetaRadar scheme is significantly better than that of the traditional radar schemes.
As a widely used localization and sensing technique, radars will play an important role in future wireless networks. However, the wireless channels between the radar and the targets are passively adopted by traditional radars, which limits the performance of target detection. To address this issue, we propose to use the reconfigurable intelligent surface (RIS) to improve the detection accuracy of radar systems due to its capability to customize channel conditions by adjusting its phase shifts, which is referred to as MetaRadar. In such a system, it is challenging to jointly optimize both radar waveforms and RIS phase shifts in order to improve the multi-target detection performance. To tackle this challenge, we design a waveform and phase shift optimization (WPSO) algorithm to effectively solve the multi-target detection problem, and also analyze the performance of the proposed MetaRadar scheme theoretically. Simulation results show that the detection performance of the MetaRadar scheme is significantly better than that of the traditional radar schemes.
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